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CBSE Physics 2026 30 Definitions for 28+ Marks: The CBSE Class 12 Physics theory exam for 2026 is scheduled for February 20, 2026, from 10:30 AM to 1:30 PM. The CBSE Class 12 Physics exam 2026 is a 3-hour paper with 70 marks for theory and 30 for practicals. It features 33 compulsory questions across five sections, with 50% weightage given to competency-based questions (MCQs, case-studies). Students who find it difficult to solve numerical questions of Class 12 Physics can check the CBSE Physics 2026 30 Definitions for 28+ Marks available here.
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CBSE Physics 2026 30 Definitions for 28+ Marks
Preparing for CBSE Physics 2026? Master These 30 Definitions for 28+ Marks available below.
| Chapters | Important Questions for 28+ marks |
| Electric Charges and Fields | Write Coulomb's Law in vector form. Define Electric Flux Write Gauss Law |
| Electrostatic Potential And Capacitance | Meaning and Properties of Equipotential Surface Properties of Conductors in Electrostatic Field Dielectrics meaning and properties |
| Current Electricity | Define Drift Velocity Explain Kirchhoff's Law |
| Moving Charges and Magnetism | Write Biot-Savart Law Write and Explain Ampere’s Circuital Law Definition of 1 Ampere Principle, Diagram, Working of Moving Coil Galvanometer and Conversion to Ammeter and Voltmeter |
| Magnetism and Matter | What is Para, Ferro, and Diamagnetism? What are their properties? |
| Electromagnetic Induction | What is Faraday's Law? Explain Lenz Law Explain Self and Mutual Inductance |
| Alternating Current | What is Power Factor? Diagram, Principle, and Working of Transformer |
| Electromagnetic Waves | Formula and Explaination of Displacement Current Properties of Spectrum and EM waves |
| Ray Optics | What is Total Internal Reflection? Explain the working of optical fiber. Diagram of Microscope and Telescope. |
| Wave Optics | Define Huygens Principle. Refraction from wave theory. Intensity Graph |
| Dual Nature of Radiation and Matter | What is Photoelectric Effect? Failure of Wave Theory Einstein’s Photoelectric Equation De-broglie Wave All graphs |
| Atoms | Outcome of Alpha-particle Scattering Bohr Model with limitations DE Broglie’s Explanation of Bohr’s Second Postulate of Quantisation |
| Nuclei | Nuclear Density What is mass defect and how it is related to binding energy? Nuclear force properties |
| Semiconductor Electronics: Materials, Devices, and Simple Circuits | Metals, Semiconductors, and Insulators on the basis of energy bond diagram What is doping? Main features of forming p-n Junction. Forward and reverse bias diagram. Half wave and full wave rectifier diagram |
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